Two rival spymasters know the secret identities of 25 agents. Their teammates know the agents only by their codenames — single-word labels like "disease", "Germany", and "carrot". Yes, carrot. It's a legitimate codename. Each spymaster wants their team to identify their agents first...without uncovering the assassin by mistake.

Catan Card Game bears only a slight resemblance to The Settlers of Catan, the original game in the Catan series. There are six resources: wool, wood, bricks, grain, ore, and gold. Before beginning the game, the players receive six square cards showing the resources, with a different die number on each card. In addition, the players start the game with two village cards and a road card connecting them. There are card stacks of more roads and villages, as well as cities, to be purchased during the game. With each new village or city comes two new resource cards. Villages and cities give victory points.